Remove confusing p4split

This commit is contained in:
Neale Pickett 2014-10-30 14:50:43 -06:00
parent d6acb1666b
commit 0db884b9bf
3 changed files with 0 additions and 160 deletions

View File

@ -1,7 +1,6 @@
CFLAGS = -Wall -Werror
TARGETS += pmerge
TARGETS += puniq
TARGETS += p4split
TARGETS += hd
TARGETS += pyesc
TARGETS += printfesc

10
README
View File

@ -21,16 +21,6 @@ but with unicode characters to represent all 256 octets,
instead of using "." for unprintable characters.
p4split -- split a pcap file by IPv4 address CIDR
---------------------------
Splits a pcap file up ito 256 files, based on a CIDR. For example:
p4split 32 < foo.pcap
Will create [0-255].pcap
pcat -- print text representation of pcap file
------------------------------

149
p4split.c
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@ -1,149 +0,0 @@
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <sysexits.h>
#include <strings.h>
#include "pcap.h"
/*
* Gaah so much crap
*/
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/ether.h>
#include <netinet/ip.h>
#include <netinet/in.h>
int
usage(int ret)
{
fprintf(stderr, "Usage: p4split CIDR\n");
fprintf(stderr, "\n");
fprintf(stderr, "Splits pcap on stdin into up to 256 files, based on CIDR.\n");
return ret;
}
int
parse_cidr(char *s, uint32_t * addr, uint8_t * bits)
{
char *slash = index(s, '/');
struct in_addr inp;
if (slash) {
*slash = 0;
*bits = atoi(slash + 1);
} else {
*bits = 0;
}
if (0 == inet_aton(s, &inp))
return -1;
*addr = ntohl(inp.s_addr);
return 0;
}
int
main(int argc, char *argv[])
{
struct pcap_file p;
struct pcap_file out[256];
int ok = 0;
uint32_t addr;
uint32_t mask;
uint8_t bits;
uint8_t shr;
int i;
if (argc != 2)
return usage(0);
if (-1 == parse_cidr(argv[1], &addr, &bits))
return usage(0);
if (bits > 24)
return usage(0);
if (bits % 8) {
fprintf(stderr, "Warning: routing prefix is not a multiple of 8.\n");
}
mask = ~((1 << (32 - bits)) - 1);
addr &= mask;
shr = (32 - bits) - 8;
for (i = 0; i < 256; i += 1) {
out[i].f = NULL;
}
if (-1 == pcap_open_in(&p, stdin))
return usage(0);
while (1) {
struct pcap_pkthdr hdr;
uint8_t octet;
char frame[MAXFRAME];
ok = 1;
if (-1 == pcap_read_pkthdr(&p, &hdr))
break;
if (1 != fread(frame, hdr.caplen, 1, p.f))
break;
{
struct ether_header *eh = (struct ether_header *) frame;
struct iphdr *ih = (struct iphdr *) (frame + sizeof(struct ether_header));
uint32_t a;
/*
* VLAN tag
*/
if (ntohs(eh->ether_type) == 0x8100) {
ih = (struct iphdr *) ((char *) ih + 4);
}
a = ntohl(ih->saddr);
if ((a & mask) != addr) {
a = ntohl(ih->daddr);
if ((a & mask) != addr) {
fprintf(stderr, "Warning: dropping unmatched packet %08x -> %08x\n",
ntohl(ih->saddr), ntohl(ih->daddr));
continue;
}
}
octet = (a & ~mask) >> shr;
}
ok = 0;
if (!out[octet].f) {
char fn[9];
FILE *f;
sprintf(fn, "%d.pcap", octet);
if (NULL == (f = fopen(fn, "wb")))
break;
if (-1 == pcap_open_out(&out[octet], f))
break;
}
if (-1 == pcap_write_pkthdr(&out[octet], &hdr))
break;
if (1 != fwrite(frame, hdr.caplen, 1, out[octet].f))
break;
}
if (!ok) {
perror("Error");
return 1;
}
for (i = 0; i < 256; i += 1) {
if (out[i].f) {
pcap_close(&p);
}
}
return 0;
}